diff --git a/app/controllers/artist_urls_controller.rb b/app/controllers/artist_urls_controller.rb
index b11ebc229..235c7b984 100644
--- a/app/controllers/artist_urls_controller.rb
+++ b/app/controllers/artist_urls_controller.rb
@@ -4,10 +4,7 @@ class ArtistUrlsController < ApplicationController
 
   def index
     @artist_urls = ArtistUrl.paginated_search(params).includes(model_includes(params))
-    respond_with(@artist_urls) do |format|
-      format.json { render json: @artist_urls.to_json(format_params) }
-      format.xml { render xml: @artist_urls.to_xml(format_params) }
-    end
+    respond_with(@artist_urls)
   end
 
   def update
@@ -20,25 +17,12 @@ class ArtistUrlsController < ApplicationController
 
   def default_includes(params)
     if ["json", "xml"].include?(params[:format])
-      [{artist: [:urls]}]
+      []
     else
       [:artist]
     end
   end
 
-  def format_params
-    param_hash = {}
-    if params[:only]
-      param_hash[:only] = params[:only]
-    else
-      param_hash[:include] = [:artist]
-    end
-    if request.format.symbol == :xml
-      param_hash[:root] = "artist-urls"
-    end
-    param_hash
-  end
-
   def artist_url_params
     permitted_params = %i[is_active]
 
diff --git a/app/controllers/artists_controller.rb b/app/controllers/artists_controller.rb
index 9224d8a82..d409718da 100644
--- a/app/controllers/artists_controller.rb
+++ b/app/controllers/artists_controller.rb
@@ -80,7 +80,7 @@ class ArtistsController < ApplicationController
 
   def default_includes(params)
     if ["json", "xml"].include?(params[:format])
-      [:urls]
+      []
     else
       [:urls, :tag]
     end
diff --git a/app/controllers/comments_controller.rb b/app/controllers/comments_controller.rb
index 425a144f4..6c44c448b 100644
--- a/app/controllers/comments_controller.rb
+++ b/app/controllers/comments_controller.rb
@@ -76,7 +76,7 @@ class CommentsController < ApplicationController
 
   def default_includes(params)
     if ["json", "xml"].include?(params[:format])
-      [:creator, :updater]
+      []
     elsif params[:format] == "atom"
       [:creator, :post]
     else
diff --git a/app/controllers/notes_controller.rb b/app/controllers/notes_controller.rb
index 2f33151f8..08e1fcc89 100644
--- a/app/controllers/notes_controller.rb
+++ b/app/controllers/notes_controller.rb
@@ -61,7 +61,7 @@ class NotesController < ApplicationController
 
   def default_includes(params)
     if ["json", "xml"].include?(params[:format])
-      [:creator]
+      []
     else
       [:creator, :post]
     end
diff --git a/app/controllers/posts_controller.rb b/app/controllers/posts_controller.rb
index 559082545..bd6f23311 100644
--- a/app/controllers/posts_controller.rb
+++ b/app/controllers/posts_controller.rb
@@ -100,7 +100,7 @@ class PostsController < ApplicationController
 
   def default_includes(params)
     if ["json", "xml", "atom"].include?(params[:format])
-      [:uploader]
+      []
     else
       (CurrentUser.user.is_moderator? ? [:uploader] : [])
     end
diff --git a/app/controllers/uploads_controller.rb b/app/controllers/uploads_controller.rb
index 66e527ea6..451995ca6 100644
--- a/app/controllers/uploads_controller.rb
+++ b/app/controllers/uploads_controller.rb
@@ -60,7 +60,7 @@ class UploadsController < ApplicationController
 
   def default_includes(params)
     if ["json", "xml"].include?(params[:format])
-      [:uploader]
+      []
     else
       [:uploader, {post: [:uploader]}]
     end
diff --git a/app/models/artist.rb b/app/models/artist.rb
index cdf6dae4a..524a2be75 100644
--- a/app/models/artist.rb
+++ b/app/models/artist.rb
@@ -4,7 +4,6 @@ class Artist < ApplicationRecord
 
   attr_accessor :url_string_changed
   array_attribute :other_names
-  api_attributes including: [:urls]
 
   before_validation :normalize_name
   before_validation :normalize_other_names
diff --git a/app/models/comment.rb b/app/models/comment.rb
index b72f65995..2c59d43cd 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -24,8 +24,6 @@ class Comment < ApplicationRecord
     :body => ->(user_name) {"@#{creator.name} mentioned you in a \"comment\":/posts/#{post_id}#comment-#{id} on post ##{post_id}:\n\n[quote]\n#{DText.extract_mention(body, "@" + user_name)}\n[/quote]\n"}
   )
 
-  api_attributes including: [:creator_name, :updater_name]
-
   module SearchMethods
     def deleted
       where("comments.is_deleted = true")
@@ -155,14 +153,6 @@ class Comment < ApplicationRecord
     select { |comment| comment.visibility(user) == :visible }
   end
 
-  def creator_name
-    creator.name
-  end
-
-  def updater_name
-    updater.name
-  end
-
   def delete!
     update(is_deleted: true)
   end
diff --git a/app/models/note.rb b/app/models/note.rb
index d5e3c2e5f..b549e9e26 100644
--- a/app/models/note.rb
+++ b/app/models/note.rb
@@ -11,8 +11,6 @@ class Note < ApplicationRecord
   after_save :create_version
   validate :post_must_not_be_note_locked
 
-  api_attributes including: [:creator_name]
-
   module SearchMethods
     def active
       where("is_active = TRUE")
@@ -28,10 +26,6 @@ class Note < ApplicationRecord
     end
   end
 
-  def creator_name
-    creator.name
-  end
-
   extend SearchMethods
 
   def post_must_not_be_note_locked
diff --git a/app/models/pool.rb b/app/models/pool.rb
index 989c4c313..b3f8ee429 100644
--- a/app/models/pool.rb
+++ b/app/models/pool.rb
@@ -15,7 +15,7 @@ class Pool < ApplicationRecord
   after_save :create_version
   after_create :synchronize!
 
-  api_attributes including: [:creator_name, :post_count]
+  api_attributes including: [:post_count]
 
   module SearchMethods
     def deleted
@@ -279,10 +279,6 @@ class Pool < ApplicationRecord
     (post_count / CurrentUser.user.per_page.to_f).ceil
   end
 
-  def creator_name
-    creator.name
-  end
-
   def validate_name
     case name
     when /\A(any|none|series|collection)\z/i
diff --git a/app/models/post.rb b/app/models/post.rb
index 84ec90cc9..4a58dfa6d 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -971,10 +971,6 @@ class Post < ApplicationRecord
         self.uploader_ip_addr = CurrentUser.ip_addr
       end
     end
-
-    def uploader_name
-      uploader.name
-    end
   end
 
   module PoolMethods
@@ -1220,12 +1216,6 @@ class Post < ApplicationRecord
     def has_visible_children
       has_visible_children?
     end
-
-    def children_ids
-      if has_children?
-        children.map(&:id).join(' ')
-      end
-    end
   end
 
   module DeletionMethods
@@ -1382,24 +1372,13 @@ class Post < ApplicationRecord
   module ApiMethods
     def api_attributes
       attributes = super
-      attributes += [:uploader_name, :has_large, :has_visible_children, :children_ids, :is_favorited?] + TagCategory.categories.map {|x| "tag_string_#{x}".to_sym}
+      attributes += [:has_large, :has_visible_children, :is_favorited?] + TagCategory.categories.map {|x| "tag_string_#{x}".to_sym}
       attributes += [:file_url, :large_file_url, :preview_file_url] if visible?
       attributes -= [:md5, :file_ext] if !visible?
       attributes -= [:fav_string] if !CurrentUser.is_moderator?
       attributes
     end
 
-    def associated_attributes
-      [:pixiv_ugoira_frame_data]
-    end
-
-    def as_json(options = {})
-      options ||= {}
-      options[:include] ||= []
-      options[:include] += associated_attributes
-      super(options)
-    end
-
     def legacy_attributes
       hash = {
         "has_comments" => last_commented_at.present?,
diff --git a/app/models/post_appeal.rb b/app/models/post_appeal.rb
index 5d2b2a17d..5241a3dbd 100644
--- a/app/models/post_appeal.rb
+++ b/app/models/post_appeal.rb
@@ -10,8 +10,6 @@ class PostAppeal < ApplicationRecord
   validate :validate_creator_is_not_limited
   validates_uniqueness_of :creator_id, :scope => :post_id, :message => "have already appealed this post"
 
-  api_attributes including: [:is_resolved]
-
   module SearchMethods
     def resolved
       joins(:post).where("posts.is_deleted = false and posts.is_flagged = false")
diff --git a/app/models/post_archive.rb b/app/models/post_archive.rb
index 615d5dae2..231efacdf 100644
--- a/app/models/post_archive.rb
+++ b/app/models/post_archive.rb
@@ -266,12 +266,8 @@ class PostArchive < ApplicationRecord
     post&.visible? && user.is_member?
   end
 
-  def updater_name
-    updater&.name
-  end
-
   def api_attributes
-    super + [:obsolete_added_tags, :obsolete_removed_tags, :unchanged_tags, :updater_name]
+    super + [:obsolete_added_tags, :obsolete_removed_tags, :unchanged_tags]
   end
 
   def self.available_includes
diff --git a/app/models/upload.rb b/app/models/upload.rb
index ecba2de14..ed19470a8 100644
--- a/app/models/upload.rb
+++ b/app/models/upload.rb
@@ -70,8 +70,6 @@ class Upload < ApplicationRecord
 
   scope :preprocessed, -> { where(status: "preprocessed") }
 
-  api_attributes including: [:uploader_name]
-
   def initialize_attributes
     self.uploader_id = CurrentUser.id
     self.uploader_ip_addr = CurrentUser.ip_addr
@@ -175,12 +173,6 @@ class Upload < ApplicationRecord
     end
   end
 
-  module UploaderMethods
-    def uploader_name
-      uploader.name
-    end
-  end
-
   module VideoMethods
     def video
       @video ||= FFMPEG::Movie.new(file.path)
@@ -229,7 +221,6 @@ class Upload < ApplicationRecord
 
   include FileMethods
   include StatusMethods
-  include UploaderMethods
   include VideoMethods
   extend SearchMethods
   include SourceMethods
diff --git a/test/functional/posts_controller_test.rb b/test/functional/posts_controller_test.rb
index ccfdb0d27..a6099c0ec 100644
--- a/test/functional/posts_controller_test.rb
+++ b/test/functional/posts_controller_test.rb
@@ -241,7 +241,6 @@ class PostsControllerTest < ActionDispatch::IntegrationTest
           assert_nil(response.parsed_body["md5"])
           assert_nil(response.parsed_body["file_url"])
           assert_nil(response.parsed_body["fav_string"])
-          assert_equal(@post.uploader_name, response.parsed_body["uploader_name"])
         end
       end
     end